That would be your best bet. Raw fish such as salmon.
Don't force feed your cat. If it's time for her to go, tell her it is okay to cross over and let go.
Dogs and cats understand so much, and they do often hang on because their people are having such a hard time. Take her in your arms and tell her you love her dearly but she has your blessing if it is time for her to cross over.
Enjoy the last day or two you have with her. Let go.